| /* | |
| * Copyright (c) 2022 SAP SE. All rights reserved. | |
| * Copyright (c) 2022, 2025, Oracle and/or its affiliates. All rights reserved. | |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| * | |
| * This code is free software; you can redistribute it and/or modify it | |
| * under the terms of the GNU General Public License version 2 only, as | |
| * published by the Free Software Foundation. | |
| * | |
| * This code is distributed in the hope that it will be useful, but WITHOUT | |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| * version 2 for more details (a copy is included in the LICENSE file that | |
| * accompanied this code). | |
| * | |
| * You should have received a copy of the GNU General Public License version | |
| * 2 along with this work; if not, write to the Free Software Foundation, | |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| * | |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| * or visit www.oracle.com if you need additional information or have any | |
| * questions. | |
| * | |
| */ | |
| #include "os_posix.hpp" | |
| #include "runtime/os.hpp" | |
| #include "runtime/safefetch.hpp" | |
| #include "utilities/globalDefinitions.hpp" | |
| #ifdef SAFEFETCH_METHOD_STATIC_ASSEMBLY | |
| // SafeFetch handling, static assembly style: | |
| // | |
| // SafeFetch32 and SafeFetchN are implemented via static assembly | |
| // and live in os_cpu/xx_xx/safefetch_xx_xx.S | |
| extern "C" char _SafeFetch32_continuation[] __attribute__ ((visibility ("hidden"))); | |
| extern "C" char _SafeFetch32_fault[] __attribute__ ((visibility ("hidden"))); | |
| #ifdef _LP64 | |
| extern "C" char _SafeFetchN_continuation[] __attribute__ ((visibility ("hidden"))); | |
| extern "C" char _SafeFetchN_fault[] __attribute__ ((visibility ("hidden"))); | |
| #endif // _LP64 | |
| bool handle_safefetch(int sig, address pc, void* context) { | |
| ucontext_t* uc = (ucontext_t*)context; | |
| if ((sig == SIGSEGV || sig == SIGBUS) && uc != nullptr) { | |
| if (pc == (address)_SafeFetch32_fault) { | |
| os::Posix::ucontext_set_pc(uc, (address)_SafeFetch32_continuation); | |
| return true; | |
| } | |
| #ifdef _LP64 | |
| if (pc == (address)_SafeFetchN_fault) { | |
| os::Posix::ucontext_set_pc(uc, (address)_SafeFetchN_continuation); | |
| return true; | |
| } | |
| #endif | |
| } | |
| return false; | |
| } | |
| #endif // SAFEFETCH_METHOD_STATIC_ASSEMBLY |